In the early years of Blackwell's marriage to Lucy Stone, he assisted her work whenever his business schedule permitted. In 1855, he lectured with her in and around Cincinnati during the summer, helped her manage the National Woman's Rights Convention held in Cincinnati that fall, and arranged winter lecture engagements for her in Wisconsin, Indiana, and Ohio. In 1856, he lectured with her in the region around their summer residence in Viroqua, Wisconsin. In the winter of 1857, when the tax bill came for their newly purchased house in Orange, New Jersey, Stone refused to pay on the basis of "no taxation without representation." After submitting to a public auction of household items to pay the tax and attendant court costs, Blackwell and Stone lectured together in Orange on "Taxation without Representation." It was in these February 1858 speeches that Blackwell first argued that woman suffrage was politically expedient no matter a party's principles or goals: Enfranchising women, he said, would allow Republicans to more than double their influence toward abolishing slavery, the American Party to double the number of native-born voters, and Democrats to give votes to labor.
Reconstruction issues , in 1866 In 1866, the National Woman's Rights Convention, meeting for the first time since before the Civil War, voted itself into the
American Equal Rights Association (AERA) to work for
universal suffrage – the vote for both blacks and women. Blackwell served as secretary of this organization during its three-year existence. In the winter of 1866–67, Blackwell and Stone lectured together on universal suffrage and formed local Equal Rights Leagues in New York and New Jersey. They also traveled to Washington, D.C., to lobby Charles Sumner against inclusion of the word "male" in the proposed Fourteenth Amendment, which would penalize states for denying black suffrage but not woman suffrage. Unsuccessful in persuading Northern politicians to use this opportunity to extend the franchise to women, Blackwell published an open letter to Southern legislators titled "What the South Can Do," again arguing that woman suffrage was politically expedient no matter a party's (or in this case, a region's) goals or fears. Using estimated figures of a white male and female electorate and a black male and female electorate, he argued that the vote of white Southern women would counterbalance the combined vote of black men and women. In the spring of 1867, the AWSA received an appeal for help from Kansas, where voters would face two suffrage referendums in the fall: one for removing the word "male" from voter qualifications, along with one for removing the word "white." Blackwell and Stone left for Kansas in March and opened the campaign. They canvassed the state for two months, returned east full of optimism, and raised funds to send more speakers and tracts. After their return, Blackwell and Stone also addressed a committee of the Connecticut Legislature in support of removing the word "male" from the state constitution's voter qualifications. Blackwell served a second speaking stint in Kansas in the fall, during which defeat became apparent. Upon his return east, he and Stone turned their full attention to creating a demand for woman suffrage apart from the AERA's call for universal suffrage. After holding a series of woman's rights meetings across New Jersey, they called a state convention to form a state woman suffrage society. The object of the New Jersey Woman Suffrage Association that formed in November 1867 with Lucy Stone as president was to use all available means to secure woman suffrage. At the AERA convention in May 1868, Stone presented two forms of petition to Congress, one for woman suffrage in the District of Columbia and territories, which could be established by an Act of Congress, and the second for a separate woman suffrage amendment to the federal Constitution. As the petitions circulated in both the east and the west during the following months, Blackwell and Stone continued organizing a woman suffrage movement separate from the AERA and its auxiliaries. In November 1868 they helped found a
New England Woman Suffrage Association and in December they helped organize state societies in Rhode Island and New Hampshire. Believing their best chance for winning an amendment to a state constitution lay in Massachusetts, Blackwell spearheaded a movement to form Liberty Leagues across the state – local organizations of male suffragists who pledged to vote only for pro-woman suffrage candidates to the legislature. After passage of the Fourteenth Amendment, Congressional Republicans began drafting a Fifteenth Amendment to explicitly prohibit states from denying the vote to black men. Again Blackwell and Stone traveled to Washington to lobby for the inclusion of woman suffrage, and again their efforts failed. Meanwhile,
Elizabeth Cady Stanton and
Susan B. Anthony mounted a campaign opposing any suffrage amendment that did not enfranchise women – seen by many as overt opposition to the Fifteenth Amendment. Disagreement over that amendment divided the May 1869 convention of the AERA. The convention rejected resolutions opposing the Fifteenth Amendment, and when Stanton and Anthony then proposed that the AERA reorganize as a woman suffrage society, the convention accepted Stone's motion that it wait until after ratification of the Fifteenth Amendment so as not to give the appearance of opposition. Nevertheless, two days later Stanton and Anthony formed the
National Woman Suffrage Association, which immediately came out as opposed to the Fifteenth Amendment. With no notice having been given that such a society was to be formed, their critics thus excluded, and no representation from state and local woman suffrage associations then in existence, many long-time suffragists did not view the organization as legitimately "national." The New England Woman Suffrage Association appointed a committee, headed by Stone, to call a convention to form a "truly national" woman suffrage organization with delegates from each state. The
American Woman Suffrage Association was formed by a national convention meeting in Cleveland, Ohio, on October 24 and 25, 1869. Blackwell drafted its constitution and was elected recording secretary.
The ''Woman's Journal'' The New England Woman Suffrage Association also established the ''Woman's Journal'', a weekly woman suffrage newspaper that became the organ of the American, New England, and Massachusetts woman suffrage associations. Henry Blackwell donated the first $1,000 of the $10,000 raised to start the paper, was one of three trustees under whom the joint stock company was incorporated, and was always the paper's largest shareholder.[44] In 1872, both he and Stone became editors and thereafter edited the ''Woman's Journal'' together, joined by their daughter, Alice Stone Blackwell, in 1881. After Stone's death in 1893, Blackwell continued editing until his death in 1909. He never took a salary for his work on the ''Woman's Journal'', which became the longest-running suffrage paper in the nation (1870–1917).
Campaigner and Strategist Blackwell was an officer of the American Woman Suffrage Association (AWSA) for many years, including being its president in 1880. He was also an officer of the New England and Massachusetts Woman Suffrage Associations, all of which shared offices with the ''Woman's Journal'' in Boston. Through involvement in Republican politics, he obtained a strong endorsement of woman suffrage from the Massachusetts Republican Party in 1872. As one of the American wing's most effective orators, Blackwell spoke on organizing tours, before state and local suffrage meetings and conventions, at hearings before state legislatures and constitutional conventions, and at hearings before Congressional committees. He and Stone worked together on several state campaigns, including Colorado in 1877 and Nebraska in 1882. After frail health kept Stone from traveling, Blackwell continued on without her, campaigning in Rhode Island in 1887 and South Dakota in 1890. One scholar characterized their work saying, "In the annals of the suffrage movement, Lucy Stone and Henry Blackwell were as much a team as Elizabeth Cady Stanton and Susan B. Anthony." Stone thanked Blackwell for the "abundant and unselfish work [he did] for women," saying, "Few men would have done it, leaving business, friends, pleasure for it." Blackwell originated the AWSA's strategy of seeking partial suffrage by legislative action. Noting that state legislatures could establish women's right to both municipal suffrage (the right to vote in city elections) and presidential suffrage (the right to vote for presidential electors) through statute, he argued that such measures might be more readily gained than constitutional amendments, which after passage by a legislature had to then be ratified by the populace. He also noted that no constitutional amendment was required for Congress to establish full woman suffrage in either the District of Columbia or the territories. Believing that achieving such measures would undercut arguments against women's voting and become a permanent wedge for full suffrage, he urged that "every point gained is a great step forward." The AWSA campaigned widely for municipal and presidential suffrage, especially during the 1880s and 1890s. After the merger of the American and National wings in 1890, Blackwell was made chair of the united association's Committee on Presidential Suffrage. Before the woman suffrage amendment to the federal Constitution passed in 1920, eleven states had established presidential suffrage, and four of those had granted municipal suffrage at the same time. Another strategy Blackwell devised was aimed at constitutional conventions. In 1889 when the territories of North Dakota, Montana, and Washington began drafting state constitutions for entry into the Union, the AWSA mobilized to press for inclusion of woman suffrage. But Blackwell realized the chances for success were slim and devised a backup plan – persuading pro-suffrage delegates, if and when it became apparent a suffrage provision would fail, to push for a clause that would enable a future state legislature to extend suffrage to women by statute. Blackwell obtained endorsements for the strategy from leading politicians and judges in other states, traveled to the constitutional conventions, lobbied their leaders, got his resolution introduced, and was given a hearing at each one. Though the effort failed, North Dakota and Montana came very close to adopting it. ==Death==